Brake arrangement



0a. 27, 1942. w, A LT Em 2,299,726

' BRAKE ARRANGEMENT Filed Dec. 19, 1940 2 Sheets-Sheet 1 II 71 71] I-l.

w. H. BASELT ETAL 2,299,726

BRAKE ARRANGEMENT Oct. 27, \1 942.

Filed Dec. 19, 1940 2 Shets-Sheet 2 the reverse direction.

- ally compact setup Patented Oct. 27, 1942 2,299,726 BRAKE ARRANGEMENTWalter H. Basalt and Wesley A. Helsten, Chicago, Ill., assignors toAmerican Steel Foundries,

Chicago,

11]., a corporation of New Jersey Application December 19, 1940, SerialNo. 370,780

30 Claims.

Our invention relates to a brake arrangement for a railway car truck andmore particularly to a form of brake commonly designated rotor typewherein the braking means comprises a series of rotors and statorsmounted for engagement with each other when the brakes are actuated.

The general object of our invention is to design a rotor brake ofrelatively simple form suitable for application to railway wheel andaxle assemblies of ordinary friction or anti-friction type.

Our invention comprehends an arrangement wherein a ring cylinder may beresiliently mounted on a frame member such as a journal box and statorsmay be supported from said cylinder for engagement with a rotor carriedon a rotating portion of the associated wheel and axle assembly. Ourinvention contemplates such an arrangement as that described wherein theactuating means or brake cylinder as the power means is operated, thepiston of course moving in the 7 reverse direction a substantially equalamount.

A more specific object of our invention is a combination such asthatdescribed .wherein a stator casting may be supported on a cylindercasting to move laterally therewith, said stator engaging the inboardbraking surface of the associated rotor while the outboard brakingsurface of said rotor may be engaged by another stator moving in unisonwith the piston. By such an arrangement the braking force applied to theoutboard face of the rotor by the piston and its associated statormoving in one direction may be opposed by the substantiallyequalreaction furnished by the cylinder acting through the lnner statoragainst the inboard face of the rotor in By this means there iseliminated any transfer of the braking forces into the frame or wheeland axle assembly as far as action and reaction of the piston andcylinder are concerned. This arrangement affords an unusuwherein minimumspace is required while offering maximum eiiiciency of performance.

Figure 1 is a fragmentary side elevation of a railway car truckembodying our novel brak arrang'ement.

Figure 2 is a transverse sectional view through the truck and brakearrangement shown in Figure 1,- the section being taken in the radialplanes indicated by the lines 22 of Figure 1.

Figure 3 is a fragmentary top plan view of the truck and brake structureshown in Figures 1 and 2.

by being resiliently supported may be displaced'slightly from its nor-.mal position by the reaction Figure 4 is a fragmentary sectional viewthrough a portion of the brake means taken in the horizontal planeindicated by the line 4-4 of Figure 1.

Figure 5 is a fragmentary view comparable to the showing in Figure 2illustrating an alternate arrangement for the release means associatedwith one of the stators.

Figure 6 is a showing of reduced size of a complete wheel and axleassembly with a braking unit for each end of the assembly, the structurecorresponding to that shown in the modification shown and described forFigures 1 to 5.

Describing our novel structure in greater detail, the truck framecomprises a side member 2 of well-known form, said truck havingequalizers not shown) which may be supported at 4 on the journal box 8,said equalizers forming the usual means of support for spring means (notshown) on which may be carried the side member 2. The Journal box 6 maybe guided between the padestal jaws 1, I and forms the usual means ofconnection with the supporting wheel and axle assembly 8 and the inboardend of the Journal box is aiiorded a closure plate iii of usual form.

0n the outboard face or the wheel l2 may be supported the rotor l4, saidrotor being secured on said wheel against relative lateral motion withrespect thereto by the stud bolts l6, l6 threaded into the hub of thewheel, said stud bolts being in alternate arrangement with the shearbolts i8, I8 which may be press-fitted as at 20 into the wheel hub.Radial clearance is afforded on opposite sides of said shear bolts as at22, 22 to accommodate expansion and contraction of the rotor i4 withoutdistortion under normal operating conditions while at the same timerestraining said rotor against relative rotation with respect to saidwheel. The rotor I4 is formed with an inboard annular braking surface 24and an outboard annular braking surface 26, the surface 28 being formedon an annular plate-like member 28 integrally Joined to the main bodyportion oi the rotor by spaced radial ribs 30, 30 spaces between saidribs ailording access for a cooling medium such as air when the brakesare in operation.

The power means is in the form of a ring cylinder 32, centrally aboutthe outer periphery of which is formed a series of three spaced annularflanges 34, 34 serving as a means of interlocking the inboard statorcasting or carrier 36 against relative lateral movement with respect tosaid cylinder. Said carrier series of spaced flanges 38, 38 definingannular 36 is formed with a slots 48, 48 about the periphery of saidcarrier, said flanges and slots being so arranged as to permit themounting of said carrier on said cylinder by relative rotation thereofin the assembly operation. After the carrier has been assembled on thecylinder the torque lug 42 (Figure 1) on said carrier may be broughtflush against the torque lug 44 at the top of said cylinder and securedthereagainst by the retaining bolt or tension member 48 which is a partof the torque arm 48, the said torque arm also comprising the tube orcasing 58 which serves as the compression member of said torque armwhile the retaining bolt 48 serves as the tension member thereof. Thetruck side frame member 2 may be formed with a torque bracket 62comprising vertical flanges joined by the transverse web or plate 54 andthe torque arm may be secured to the web 54 with blocks of resilientmaterial 58, 58 being interposed between the plate 54 and thecompression member 58 and the tension member 48 of said torque arm, saidtension and compression members being ailorded end plates 58, 58 assuitable seating means for said resilient pads.

The carrier 38 is of ring-like or annular form and comprises theinwardly directed annular flange or stator portion 88 on the outboardface of which may be supported the brake facing 82 arranged forengagement with the inboard face or braking surface 24 of the rotor l4.

At opposite sides of the cylinder casting 82 may be formed spaced shearlugs 84, 84 (Figure 4) between which may be received the shear lugs 88,88 welded as at 88, 88 on the outboard stator 18 thus preventingrelative rotation of the stator 18 and the piston and ring cylinder.

The ring type cylinder is formed with a face plate 12 serving asconvenient mounting means for a fitting through which compressed air-maybe applied as needed.

Fitted within the cylinder is the ring type piston 14, said piston beingfitted with a gasket I8 of suitable form to prevent air leakage. Theannular inboard face of the ring piston 14 seats as at I8 against theinsulator ring 88, said facing ring affording convenient seating meansfor said piston against the outboard stator 18 to which said facingringmay be secured. Said stator 18 is afforded an annular brake surface 82which may abut the outboard brake surface 28 of the rotor I4.

The cylinder 32 is resiliently supported from the Journal box by meansof angle irons 84, 84 which may be secured on the closure plate of thejournal box at the top and bottom thereof by means of stud bolts 88, 88which also serve as securing means for said closure plate. Secured t theangle irons or support plates 84, 84 at opposite edges thereof as byvulcanizing are spaced resillent pads or cylinder support and releasemeans 88, 88 and on the opposite faces of said pads 88 maybe vulcanizedthe plates 98, 98 (Figure 2), said plates being fianged over as at 92 tohave bearing against the outboard edge of the inner perpihery ofthe'cylinder 32. Likewise the edges of the plates 98, '98 bear againstthe shear lugs 94, 94 (Figure 1) provided on said inner periphery toprevent relative rotational movement between the cylinder and saidplates. Intermediate the plates 98, 98 are positioned the resilient pads98, 98 serving as release means for the ring piston. Each piston releasespring 98 is carried on and may be vulcanized to one of thebefore-mentioned plates 84 and the offset plate 98 which is also securedby means of the stud bolts 88, 88 may serve as a stop to limit inboardtravel of the cylinder 32. On the opposite face of each release pad 98may be fulcrumed the plate I88 which may be flanged over at its inboardedge as at I82 (Figure 2) to afford bearing against the inner peripehryof the outboard stator 18. The outboard stator 18 is prevented fromassuming an eccentric position with regard to the cylinder or piston byspaced peripheral abutments as at I84 (Figures 2 and 4) against thecarrier 36. The release pads 98 are applied in shear so as to urge theflange I82 of the plate I88 against the stator 18 thus holding the saidstator normally in position against the ring piston 14.

In operation assuming the parts to be in normal relationship as shown inthe drawings, application of air to the ring cylinder will causerelative lateral movement between the cylinder and the piston, saidcylinder being resiliently mounted on the pads 88, 88 and the pistonresiliently restrained by further flexure of the release springs 88, 98.This spreading movement between the cylinder and the piston willcontinue until the inboard stator bears against the inboard face of therotor at 24 and simultaneously the outboard stator will bear against theoutboard face of the rotor as at 28. With release of the brakes theparts .will return to their normal position as shown in the drawings.With the cylinder and piston mounted as shown some provision is thusafforded for relative lateral motion between the wheel and axle assemblyon which the rotor is carried and the Journal box on which the powermeans and stator are supported. Adjustment of the relative positions ofthe stators and rotors may be secured by shimming the closure plate I8as may be desired.

The modification of our invention shown in Figure 5 correspondsgenerally to that just described except that the piston release springsare supported about the outer periphery of the cylinder instead of aboutthe inner periphery thereof. As seen in Figure 5 the rotor I28 may besupported on the outboard face ofthe wheel I22 in manner similar to thatdescribed for the previous modification with shear bolts I24 preventingrelative rotation between said rotor and said wheel. In thismodification the cylinder casting I28 may be supported as described forthe previous modification and the inboard stator I28 may be mounted fromthe casting I28 likewise as described for the previous modification. Thecylinder casting I26 is supported from a series of resilient pads I38interposed between the angle plates I32 and I34, the latter of which maybe secured by a series of stud bolts I38 in the manner described for theprevious modification. In this modification the cylinder casting I26 isrestrained against inboard movement by the angle plate I38 alsomaintained in position by the bolts I38, I38. In this modification therelease springs for the piston I48 are supported from angle plates I42bolted as at I44 to the annular flange H8 integrally formed on thecylinder casting. The angle plate I42 may be vulcanized to one face ofthe release spring I48 and the opposite face of said release spring padmay be vulcanized to the angle plate I58 which is flanged over as at I52at its inboard edge to bear against the outer periphery of the outboardstator I54. The annular flange I48 on the cylinder casting is projectedat one point in the torque lug I58 which may be bolted as at I58 to thetorque arm I68, the opposite end of which may be connected to the saidpiston, and the other of aeoavae frame as desired. Otherwise thismodification corresponds to that, previously described and the method ofoperation is similar thereto.

It is to be understood that we do not wish to be limited by the exactembodiment of the device shown which is merely by way of illustrationand not limitation as various and other forms oi the device will. ofcourse, be apparent to those skilled in the art without departing fromthe spirit of the invention or the scope of the claims.

We claim:

1. In a brake arrangement, a wheel and axle having a journal end, airamemember supported thereon, spaced resilient pads on said frame membersupporting a ring cylinder therearound, brakes comprising a rotormounted on said wheel to rotate therewith, stators supported from said'of said rotor, a piston cylinder on opposite sides in said cylinderoperable to actuate said brakes,

one of said stators being laterally movablewith said stators beinglaterally movable with said cylinder in the reverse direction uponactuation of said brakes, said resilient pads serving as release meansto restore said cylinder to normal position after actuation of saidbrakes, and other release means mounted about the outer periphery ofsaid cylinder to restore said piston to normal position.

2. In a brake arrangement, a wheel and axle having a journal end, aframe member supported thereon, spaced resilient pads on said framemember supporting a ring cylinder therearound, brakes comprising a rotormounted on said wheel to rotate therewith, stators supported from saidcylinder on opposite sides of said rotor, a piston in said cylinderoperable to actuate said brakes, one of said stators being laterallymovable with said piston, and the other of said stators being laterallymovable with said cylinder in the reverse direction upon actuation ofsaid brakes, said resilient pads serving as release means to restoresaid cylinder to normal position after actuation of said brakes. andother release means mounted about the inner periphery of said cylinderfor restoring said piston to normal position.

3. In a brake arrangement for a. vehicle, a frame member, a wheel andaxle assembly having a Journal end, a Journal box aii'ording aconnection between said member and said Journal end, and braking meanscomprising a rotor supported on said wheel, power means resilientlysupported from said box, and a plurality of stators supported from saidpower means on opposite sides of said rotor for engagement therewith,said power means comprising a piston, said resilient mounting permittingsaid power means to react in one direction when said piston is actuatedin the opposite direction upon application of said brakes, and saidresilient mounting operating as release means after actuation of saidbrakes to restore said power means to normal position.

4. In a brake arrangement, a wheel and axle having a journal end, aframe member supported thereon, spaced resilient pads on said framemember supporting a ring cylinder therearound, brakes comprising a rotormounted on said wheel to rotate therewith, stators supported from saidcylinder on opposite sides of said rotor, a piston in said cylinderoperable to actuate said brakes, one of said stators beinglaterallymovable with said piston, and the other of said stators being laterallymovable with said cylinder in the reverse direction upon actuation ofsaid brakes, said resilient pads serving as release means to restoresaid cylinder to normal position after actu ation of said brakes. v

6. In a brake arrangement, a wheel and axle having a journal end, aframe member supported thereon, spaced resilient pads on said framemember supporting a ring cylinder therearound,

brakes comprising a rotor mounted on said wheel to rotate therewith,stators supported from said cylinder on opposite sides'of said rotor, apiston in said cylinder operable to actuate said brakes, one of saidstators being laterally movable with said piston, and the other of saidstators being laterally movable with said cylinder in the reversedirection upon actuation of said brakes, and release means mounted onsaid cylinder for restoring said piston to normal position, said spacedpads operating as release means for said cylinder after actuationthereof.

6. In a brake arrangement for a vehicle, a irame member, a wheel andaxle assembly having a Journal end, a Journal box affording a'connectionbetween said member and said Journal end, and braking means comprising arotor supported on said wheel, power means resiliently supported fromsaid box, and a plurality of stators supported from said power means onopposite sides of said rotor for engagement therewith, said power meanscomprising a piston, said resilient mounting permitting said power meansto react and move in one direction when said piston is actuated in theopposite, direction upon application of said brakes.

7. In a brake arrangement, a wheel and axle assembly having journalends, frame members supported on said Journal ends, stators supportedfrom said wheels, power means supported from said members at oppositeends of the assembly and the carrying stators for engagement withopposite sidesof the adjacent rotors, pistons in said power means, oneof said stators associated with each rotor being laterally movable withthe associated power means upon application of said brakes, and theother of said stators and the assoelated piston being laterallymovablein the reverse direction upon application 01' said brakes, each of saidpower means being supported from the associated frame member by spacedresilient pads about a periphery of said power means.

8. In a brake for a vehicle, a wheel and axle having a journal end, aJournal box supported thereon, a rotor carried by said wheel, spacedresilient means on said box supporting a ring cylinder therearound,spaced stators supported from said cylinder at opposite sides of saidrotor, a piston in said cylinder, one of said stators having fixedrelationship with said cylinder for lateral movement therewith asactuation of said power means causes movement of said piston and theother of said stators in-the reverse direction, and

release means for said piston mounted at spaced points around saidcylinder.

9. In a brake for a vehicle, a wheel and axle having a. Journal end, a.Journal box supported thereon, a rotor carried by said wheel, spacedresilient means on said box supporting a ring cylinder therearound,spaced stators supported from said cylinder at opposite sides of saidrotor, a piston in said cylinder, one of said stators having fixedrelationship with said cylinder for lateral movement therewith asactuation of said power means causes movement of said piston and theother of said stators in the reverse direction, and release means forsaid piston and the associated stator mounted at spaced points on saidcylinder.

10. In a brake for a vehicle, a wheel and axle having .a journal end, ajournal box supported thereon, a rotor carried by said wheel, spacedresilient means on said box supporting a, rin cylinder therearound,spaced stators supported from said cylinder at opposite sides of saidrotor, 25. piston in said cylinder, one of said stators having fixedrelationship with said cylinder for lateral movement therewith asactuation of said power means causes movement of said piston and theother of said stators in the reverse direction, and release means forsaid piston mounted at spaced points about the periphery of saidcylinder.

11. In a brake arrangement, a frame member, a supporting wheel and axle,power means resiliently mounted on said member, said resilient mountingcomprising a plurality of resilient pads fixed at spaced points on saidmember and respectively connected to said power means, a rotor mountedon said wheel, and stators supported from said power means forengagement with opposite sides of said rotor, one of said stators havingfixed relationship with said power means, and the other of said statorsbeing movable with respect to said power means upon actuation of saidbrakes, resilient mounting of said power means serving as release meansto restore said power means to normal position after actuation of saidbrakes.

12. In a brake arrangement, a frame comprising a. member, a supportingwheel and,axle, power means resiliently supported at spaced areas fromsaid member, a rotor supported from said wheel, spaced stators supportedfrom said power means on opposite sides of said rotor, one of saidstators havin fixed relationship with said power means for lateralmovement therewith upon application of said brakes, and the other ofsaid stators being laterally movable with respect to said power meansupon application of said brakes whereby said stators are brought intoengagement with opposite sides of said rotor, a resilient torqueconnection between said frame and said power means, said fixed statorbeing rotatable relative to said power means for dismantling thereof.

13. In a brake arrangement, a wheel and axle having a journal end, aframe member supported thereon, spaced resilient pads mounted on saidframe member for supporting a ring cylinder therearound, a rotor mountedon said wheel to rotate therewith, stators supported from said cylinderon opposite sides of said rotor, a piston in said cylinder operable toactuate said brakes, one of said stators'being laterally movable withsaid piston. ally movable with said cylinder in the reverse directionupon actuation of said brakes, said spaced resilient pads serving asrelease means for said ring cylinder after actuation of said brakes.

14. In a brake for a vehicle, a wheel and axle having a journal end, ajournal box supported thereon, a rotor carried by said wheel, spacedresilient means on said box supportin a ring cylinder therearound,spaced stators supported from said cylinder at opposite sides of saidrotor, a piston in said cylinder, one of said stators having fixedrelationship with said cylinder for lateral movement therewith asactuation of said cylinder causes movement of said piston and the otherof said stators in the reverse direction, said spaced resilient meansalso operating to restoresaid cylinder to normal position afteractuation thereof. 15. In a vehicle brake, a wheel and axle having ajournal end, a journal box supported thereon, a frame comprising amember supported from said and the other of said stators being laterbox,a rotor mounted on said wheel, a ring cylinder resiliently supportedaround said box and having a resilient torque connection to said frame,spaced stators supported from said cylinder, one of said stators beingfixed with relation thereto, and the other of said stators beinglaterally movable with respect thereto upon application of said brakes,said fixed stator being removable from said cylinder by relativerotation with respect thereto.

16. In a brake arrangement, a wheel and axle assembly having journalends, frame members supported on said ends, rotors supported from saidwheels outboard thereof, power means supported on each of said framemembers and carrying stators for engagement with opposite sides of theadjacent rotors, one of said stators being fixedly mounted on theassociated power means, and the other of said stators being supportedfor lateral movement with respect thereto upon application of saidbrakes, each of said fixed stators being removable from the associatedpower means by relative rotation with respect thereto.

17. In a brake arrangement, a frame member, a supporting wheel and axle,spaced resilient pads affording support for power means mounted on saidmember, a rotor mounted on said wheel, and stators supported from saidpower means forv engagement with opposite sides of said rotor, one ofsaid stators having fixed relationship with said power means, and theother of said stators being movable with respect to said power meansupon actuation of said brakes. said pads serving as release means forsaid power means.

18. In a vehicle brake, a wheel and axle having a journal end, a journalbox supported thereon, a frame comprising a member supported from saidbox, a rotor mounted on said wheel, a ring cylinder resilientlysupported around said box and having a torque connection to said frame,spaced stators supported from said cylinder, one of said stators havingfixed relationship with said cylinder for lateral movement therewithupon application of said brakes, and being releasable from said cylinderby relative rotation with respect thereto.

1%. In a brake arrangement, a frame member, a supporting wheel and axle,spaced resilient pads affording support for power means supported fromsaid member, a rotor supported from said wheel, and spaced statorssupported from said power means on opposite sides of said rotor, one ofsaid stators having fixed relationship with said power means for lateralmovement therewith upon application of said brakes, said pads affordingrelease for said power means after actuation thereof.

20. In a brake arrangement, a frame member, a supporting wneel and axle,spaced resilient pads affording support for power means mounted on saidmember, a rotor mounted on said wheel, and stators supported from saidpower means for engagement with opposite sides of said rotor, one ofsaid stators having fixed relationship with said power means, said padsaffording release for said power means after actuation thereof.

21. In a brake arrangement, a frame, a wheel and axle assembly affordingsupport for said frame through the medium of a journal box, spacedresilient pads fixed about the periphery of said box, power meanssecured to said pads, brakes comprising a rotor mounted on said wheeland stators supported from said power means at opposite sides of saidrotor, and a piston resilientsaid power ton and power means power meansfor actuation of frame through the medium of a Journal box,

spaced resilient pads fixed about the periphery of said box, power meanssecured to said pads, brakes comprising a rotor mounted on said wheeland stators supported from said power means at opposite sides of saidrotor, and a piston resilient. ly mounted 'on said power means foractuation of said brakes, the respective resilient mountings of meansand piston permitting their movement in reverse directions uponoperation of said power means and serving to restore said pisto normalposition thereafter.

23. In a rotor brake arrangement, a frame, a wheel and axle assemblyhaving a journal end, a Journal box on said end afiording support forsaid frame, resilient pads fixed said box, and a ring cylinder movablymounted on said pads and axially movable by distortion thereof.

. 24. In a rotor brake arrangement, a frame, a wheel and axle assemblyhaving a Journal end, a Journal box on said end 'aifording support forsaid frame, resilient pads fixed at spaced points about said box, a ringcylinder movably mounted on said pads, a piston in said cylinder, andother resilient pads fixed at spaced points about theperiphery of saidcylinder for release of said piston. I

25. In a brake arrangement, a journal box, a

- supporting wheel and axle, and rotor brake means associated with saidbox resilient pads fixed about the'periphery of said actuation of saidbrake means, said ring cylinder being axially movable by distortion ofsaid pads and said pads being eifective to restore said cylinder tonormal position.

at spaced points aboutand said wheel, spaced said box, said power meansbeing axially movable by distortion of said pads and said pads beingeffective to restore said power means to normal position.

27. In a brake arrangement, a wheel and axle assembly, an associatedjournal box, 'spaced resilient pads fixed on said box, power meansmounted on said'pads .Ior movement relative to said box, a pistonassociated with said power means, and other resilient pads fixed on saidpower means for release of said piston.

28. In a brake arrangement, a frame comprising a Journal box, asupporting wheel and axle.

I rotor brakes mounted between said wheel and spaced points, a

26. In a brake arrangementa wheel and axle assembly, an associa edJournal box, spaced resilient pads fixed on said-box, and power meansmounted on said pads for'm'ovement relative to said frame, resilientmeans fixed on said box at ring cylinder mounted on said resilient meansaround said' axle, said cylinder being axially movable by distortion ofsaid resilient fective to restore said cylinder to normal position,

a stator associated with said cylinder, and a resilient torqueconnection between said frame and said cylinder.

29. In a brake arrangement, a frame comprising a Journal box, asupporting wheel and axle,

rotor brakes mounted between said wheel and said frame, resilient meansfixed on said box at spaced points, a ring cylinder mounted on saidresilient means around said axle, a stator associated with said.cylinder, and'a resilient torque connection between said frame and saidcylinder, said stator being releasable from said cylinder by relativerotation with respect thereto.

30. In a brake arrangement, a frame comprising a Journal box, asupporting wheel and axle, between said wheel and said rotor brakesmounted frame, resilient means fixed on said box at spaced points, aring cylinder mounted "on said resilient means aroundsaid axle, a statorassociated with said cylinder, a resilient torque connection betweensaid frame and said cylinder, and resilient pads fixed about a releaseof the associated piston.

' WAL'I'ER H. BABEL'I.

- WESLEY A. HELS'I'EN.

means and said resilient means being e1- periphery of said cylinder for

